3, 5, 6-trichloro-2-pyridinol (TCP) is a widespread organic pollutant with persistent, mobile and high antimicrobial effects. Here, nanoFeO was firstly introduced into the anoxic biodegradation of TCP. It was found that nanoFeO significantly accelerated TCP biodegradation. The removal rate of TCP (100 mg L) increased from 83.03% to 98.74% within 12 h in the presence of nanoFeO, and the addition of nanoFeO also promoted the accumulation of CO. Reductive dechlorination mechanism was involved in anoxic biodegradation of TCP. Molecular approaches further revealed that nanoFeO distinctly induced the shifts of bacterial community. The dominant genus Ochrobactrum was converted to genus Delftia in nanoFeO treatment, and the relative abundance of Delftia increased from 10.26% to 44.62%. Meanwhile, the total relative abundance of bacteria related to TCP dechlorination and degradation significantly increased in the presence of nanoFeO. These results indicated that nanoFeO induced the enrichment of TCP-degrading bacteria to promote the anoxic biodegradation of TCP.
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| http://dx.doi.org/10.1016/j.chemosphere.2019.06.114 | DOI Listing |
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